Self accelerating reed switch magnet spinner.

[Tito L. Oracion]

Tito excels at enigmatic riddles.




No!, i'm actually trying to synchronize unsynchronize heads. joke 

[Magluvin]

@Magluvin,

Partial quote from Mags:

"I see Igor is using a single cell battery voltage of 1.3v.  That is key to what he is doing".

I think maybe the fact that you implied that Igor might actually be doing something, may have been perceived as too kind from the balustrade of a skeptic.

All Im saying is YES, it is a good way to send the coil energy back to the source. If the source were say 12v, the hv from the coil could breach the space between the switch contacts and produce continued forward current, draining the batt even more while the switch is suppose to be open. Basically it is good that he is using low voltage. It is a very good demonstration of what I have been saying for a while now.

But trust me, when the reed opens, the coil initially has all the intention of pushing current forward. But if the potential currents in the coil have no forward path, the field will collapse completely, charging the coils internal capacitance, the field goes into reversal and then the coil tries to push current in reverse. Once that potential reaches the conductivity of the white led 3.5-4v, then the coils currents have a path, back to the battery in a direction that charges it. He may get better results with just a plain diode that will conduct at .5-.7v  or red led at 2.1v, reducing the voltage drop which should send more back to the battery.

Mags

[Dave45]

I have found similarly that coil field collapse can happen in forward direction 'or' backwards.

From what is known, when we switch on dc to a coil then switch off, the field collapse causes more forward current from the coil. But what I had found a couple years ago was that if there is no where for that forward collapse current to go in the forward direction, then the field collapse charges the coils self capacitance to peak, and that stored voltage bounces back through the coil causing a reverse current and field.

I call it field collapse because Back/Reverse emf doesnt really apply during initial field collapse because the resulting current is forward and has nothing to do with a field collapsing on the coil that made it. BEMF has everything to do with impedance of a coil. The gradual field building of an inductor is due to Reverse emf due to currents building in the coils windings, which all the windings are inducing all the others at the same time and the induced windings want to push current in the opposite direction.

The only thing I can figure about how coils do what they do is because of resistance. Due to resistance, the voltage/current applied to the coil will always supercede the back/reverse emf and the input will eventually win the battle of fighting the bemf till the bemf does not exist and current from the input gets to its maximum due to resistance.

Soo, if the coil were super conducting, zero resistance, I believe the coil would not pass current at all as the bemf should be equal to the input, like the magnet floating on a super cooled super conductor.

I see Igor is using a single cell battery voltage of 1.3v.  That is key to what he is doing. If the input is higher, then there is a chance that the voltage potential developed by the coil collapse could be high enough to breach the gap in the read switch(spark). Reeds are pretty good at fast switching mechanically. Quick to close and open the distance between contacts. So the quicker the reed springs to its fully open position, the less chance of the collapse current from jumping the contacts.

On can easily get higher than input voltages from a coil collapse into a cap using a diode, WITH THE DIODE IN EITHER DIRECTION.      In one direction, when the reed is closed sending power to the coil, the diode does not conduct until the coil collapse. With the diode in the other direction, source current does flow to the cap and coil, but when the coil collapses, the cap gets just about as much HV as it did with the diode the traditional way.  This was when I discovered that the collapse can develop currents in either direction, depending on a way out for those currents. If there is no way out, then the collapse currents will die off within the coil in the form of oscillation within the coils LC. This isolated oscillation within the coil is at its resonant freq, whether it be 4mhz or 100hz depending on the coil and its self capacitance.


Possibly this is what Tesla switching is all about. Using a high speed rotor, the closing of the contacts, then the opening and creating distance very quickly and collapse currents dont have a chance to breach the gap. Just thoughts.


Mags

good explanation Mags

[Magluvin]

  good explanation Mags

Thanks Dave

Well the energy from the mag field collapse has to go somewhere. If it can go forward, and it can go backward, then my explanation has merit. And I have not found another explanation for it, nor is there one out there like mine, that I know of. I have searched and not one book on power supplies or other lit has even shown or described the actual reverse possibilities, only forward. Strange.

Funny thing, Falstads Circuit sim can show it also. And you can pulse a coil and let it go and a scope trace will show a big hf oscillation of the coil. 

An easy example of showing the coil have reverse current from collapse is to put up a coil, dc source and a momentary switch in a loop. The add a diode across the switch in the reverse of switch on current. When you release the switch, the coil charges the source.  In real life, if the voltage potential developed across the coil during the first collapse is high enough to breach the switch, be it a reed, transistor, etc, then the coil will dissipate forward current, further depleting the source when the switch is suppose to be off. So be encouraged to work with low input voltage with reeds so as to avoid sparking the contacts because the collapse voltage isnt high enough to breach the gap.  Some use a cap across the reed and it can help. But real small caps can get to really high voltages and guess where the cap is? Across the switch contacts. ZAP. Ive ruined more reeds with a super small cap across them than a larger one.  And then, hope that the reed doesnt close while the cap is charged. It can be a waste of energy.

Higher voltage, bigger open gaps and faster switching motion. It does take a bit of time for the collapse current to build a high potential, so the switch would have to beat that time and get to max open gap before the spark can jump. So Tesla's rotary switch makes a lot of sense in that respect.

Mags

[synchro1]

Dr. Stiffler demonstrates an oscillartory zone of swinging magnets that is a specific distance from the speaker magnets that help power the oscillation:

http://www.youtube.com/watch?v=IljUwQGEkGo

Imagine holding the magnets stationary in the free swing zone, and wrapping them with a wire coil. Any chance we could measure any output from them? I think so!


The pendulum of magnets settles down to a stable oscillating frequency, Dr. Stiffler states it ran continuously at a this stable frequency. Perhaps if we determined what this oscillating frequency was, we could build a resonant LC tank around the stationary magnets to assist, and amplify any output?